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Family LAMNIDAE 



Lamna cornubica (Gmelin). Mackerel Shark. 

 (Plate II, Figure H) 



One specimen, 4!/2 feet long, taken about ten miles southeast of 

 Laguna in a barracuda drift net on July 26. This species is not re- 

 corded by Starks and Morris, but is said to be, "not rare in Califor- 

 nia," (Jordan and Evermann, Fishes of N. and Mid. America, Vol. 

 I, p. 49). The specimen taken near Laguna was brought ashore and 

 kept for some time, so there can be no question as to the identity. 

 The accompanying photograph shows the general appearance of the 

 fish. 



Family SQUATINIDAE 



Squatina squatina (Linnaeus). Angel Shark. 



Several specimens of this species were taken by the fishermen in 

 rather deep water off Newport. 



Family RHINOBATIDAE 



Rhinobatus productus Ayres. Shovel-nose Shark, Guitar Fish. 

 (Figures 1 and 2, and 2 A) 



This was the most common ray found in the vicinity of Laguna. 

 At Newport Beach a favorite sport of the "Sunday fishermen" is 

 catching these large rays from the pier, where numbers take the bait 

 and are hauled up every day. 



The following notes were taken on a female specimen four feet 

 long. Measurements in hundredths of body length. Snout to pos- 

 terior apex of pectoral, 38 ; snout to ventrals, 18 ; snout to first dorsal, 

 59 ; distance between dorsals, IQi/o ; tip of snout to vent, 41 ; breadth 

 across pectorals, 34 ; height of first dorsal, 7.3 ; second dorsal same ; 

 length of abdominal cavity, 19.5. The abdominal cavity is very broad, 

 the anterior two-thirds being nearly square. Posteriorly it narrows 

 decidedly, both dorso-ventrally and laterally, due to the intrusion of 

 the vetebral column and pectoral fin cartilages. This shape is well 

 shown by the outline of the viscera in the accompanying figure 

 (Figure 1), which is taken from this specimen. Figure 1 shows the 

 viscera entire, in its natural position as found in the body cavity. 

 Figure 2 represents the same with the various organs separated from 

 one another sufficiently to show their individual forms. The ali- 

 mentary canal is severed just in front of the liver. In Figure 1 a 

 somewhat distorted appearance is given to the viscera by the en- 

 larged oviducts, each of which is swollen with a well developed egg. 

 The liver is trilobate, the lateral lobes extending a short distance 



