GILBEUr ANll ST AUKS — FISHES OF I'AN'AMA 1!AV 7 



IIIIU. 



Hiise of ventrais 27 



Snout to base of dorsal tin proper, not including fleshy nd^e 167 



Uase of first dorsal 51 



Heij^ht of anterit)r niarijin of first dorsal (not includinjj fleshy huni|) at Ixise) 65 



1 lei.L;hl of posterior niarj^in 2g 



Distance between dorsals 125 



Base of second dorsal 39 



Distance from second dorsal to base of upper cautial lobe 52 



I.enjjth of upper caudal lobe ^. no 



I )istance from tip of cautlal to base of notch..' 41 



Distance from base of notch to origin of lower lobe 75 



Distance from orii;iii uf louir caudal lobe to base of anal 39 



r.ase of anal 26 



A specimen of Gakii>i ciiUfontlriii^ from Arngdalen;! liay, TiOwcr r'aliforniii 

 (No. I 104 L. IS. J. U.) compafcd witli J/. lannUUuA hits tlie f^iis less incised and with 

 iduiidfd anji-les, the snout broader and less pointed, the lips longer, about equaling 

 width of nostril, and tiic duisal more hack wart! in position, its base contained three and 

 one-fourth in its distance from snout. The angle of the mouth is also much greater. 



G. c(d[fornicu!< ranges to the southward along the entire coast of Lower Cali- 

 fornia and throughout the Gulf of California, where it is found as.sociated with 

 .1/. liinii/atiis. Tt occurs doubtless at Mazatlan, althougii it has not yet been recorded 

 from that point. It was obtained by the "Albatross" in ]<S89 at San Quentin and 

 IMagdalciia bays on tlie outer coast of Lower California, and in Coneepcion Bay, San 

 Tjiiis (ionzules Bay, and at Station o02C) in the (Julf of California. The fietuses 

 reported from Guaymas by Evermann and .Jenkins (1S!>1, p. I'J!*), Mixier the name 

 of Gakus dorsall^, belonged to G. californicax, as is sulHcicntly evident from their 

 measurements. 



3. Galeus dorsalis Gill. 



I'l \TI I, I'lc:. 2. 



Previous diagnoses have called attention to the low, comparatively little-incised 

 fins, and the short caudal. More conspicuous difTerences are found in tlie small size 

 of the eye, the large spiracle, and the large nostrils. The diameter of the eye is 

 contained 2; to 3 times in the distance from tip of snout to front of upper jaw. In 

 .1/. htmdatus of the same size, it is contained twice in this distance. The width 

 of the internasal septum is less than the distance from inner angle of nostrils to 

 margin of snout, while greater than this distance in I/, lunulalui^. The spiracle is a 

 long slit, I or more than I diameter of eye. The nasal valve is smaller than in 

 related species, produced mcsially into a narrow flap, the width of which does not 

 exceed \ witlth of nostril. The inner folds are also much simpler and smaller, and 

 fail to conceal the olfactory mcmljranc. The snout is narrower and sharper, with 

 the outlines less curved; it is also thinner, so as to a])pear whitish-translucent. The 

 pores on snout are much more conspicuous than in related species, and contribute to 

 give it a spongy texture; they are numerous on top and sides of snout as well as 

 below, and are clustered to form a consi)icuous patch below front of eye. The 

 shagreen is much coarser than in .1/. Innulntus. 



