8 BULLETIN 95, UNITED STATES NATIONAL MUSEUM. 



Following are the dimensions of this specimen : 



mm. 

 Total length 500 



Tip of snout to eye 42 



Interorbital 24 



Eye 13 



Tip of snout to antei-ior margin of moutli 32. 5 



Tip of snout to anterior gill slit 91 



Tip of snout to origin of first dorsal 154 



Base of first dorsal , 58 



Height of first dorsal 46 



Origin of first dorsal to origin of second dorsal 158 



Origin of second dorsal to base of caudal 101 



Tip of snout to origin of pectoral 112 



Length of pectorals 81 



Origin of pectorals to origin of ventrals 119 



Origin of ventrals to origin of anal 105 



Length of lower caudal lobe anterior to notch 67 



Breadth of head 55 



Depth of head between eyes 25 



Depth of body 47 



Length of spiracle 3.5 



Body low, elongate; head broad, strongly depressed; eyes small; 

 spiracle very small, mouth angular; labial folds well developed; 

 teeth with the single median cusp, rather blunt. Dorsal slightly fal- 

 cate, posterior lobe scarcely reaching vertical from origin of ven- 

 trals; second dorsal similar to first, but smaller; upper caudal lobe 

 5.38 in total length; anal inserted under middle of second dorsal; 

 pectoral broad, tip reaching nearly to posterior base of first dorsal. 



A careful comparison of this individual with the type of 71/. dor- 

 salis reveals the following slight differences : The breadth of the head 

 is a little greater, the length of the lower caudal lobe anterior to the 

 notch is shorter; the insertion of the anal is slightl}^ more caudad. 

 The type and paratypes of dorsalis are badly shrunken and for this 

 reason the value of these differences is questionable. 



Ten embryos, 6 males and 4 females, field No. 09536, 7.8-9.1 cm. 

 long, from Lobos de Tierra. Doctor Coker's notes say that these 

 embryos are from 2 plain sharks measuring about 80 cm. in length. 

 One bore 5, the other 6, embryos. These are too small for certain 

 identification, but agree quite closely with this species. The remnant 

 of the yolk-sac, closely resembling a placenta, still remains in some 

 of these specimens. This character is figured by Waite in the 

 young of Galeus australis} 



1 Sci. Res. New Zealand Govt. Trawling Exped., 1907, Records Cant. Mus., vol. 1, 1909, 

 No. 2, pi. 15. 



