SQUATINA ANGELUS. 405 



like the teeth, of a sickle, which is, perhaps, for the better holding and 

 cutting of their prey. Each row becomes stronger and longer as it 

 becomes more inward. The ductus cysticus is not above -i-th of an 

 inch long. 



The male dog-fish has two long processes close to the anus, connected 

 to the posterior lateral [ventral] fins, which pass backwards in the 

 direction of the body of the fish, just as in a skate, &c. As the female 

 seldom have such processes, and those that they have are very short, I 

 did suppose that their use in the male was to embrace the female in the 

 time of coition ; but I do suppose that they are the two penes. The vasa 

 deferentia swell into oblong bags and terminate within the anus into a 

 pyramidal body. The testes are higher up in the abdomen, and are 

 very large 1 . 



The female has a small clitoris, in shape like the penis of the male : 

 some females have small processes at the anus. 



I did suppose that the dog-fish were young sharks, but I now rather 

 suppose that they are not ; for in these dog-fish the parts of generation 

 were complete and full of semen. It is, perhaps, a small [kind of] 

 shark. 



The Nuss, or Spotted Dog-fish [Scyllium canicula, Cuv.] . 



I bought two fish for ' dog-fish.' These differences appeared. There 

 were no spurs on the back ; therefore they were similar to the shark. 

 The nose communicated with the mouth as in the skate or thornback. 

 The teeth were not in distinct rows, as in the dog-fish or shark ; but a 

 pretty broad surface was studded with them, as in the skate, but they 

 were not so strong or so broad. The snout did not project so far beyond 

 the mouth as in either the dog-fish or shark: it likewise was more 

 transverse, not so semilunar. In the shape of body, skin, fins and tail, 

 these were just like the dog-fish or shark : so were the external parts 

 [of generation]. 



This is the fish called the ' nuss.' It lays eggs, similar to the skate. 



The Kingston Fish [Monk-fish (Squatina Angelus, Cuv. 2 )]. 



The kingston fish and torpedo would seem to be in a middle state 

 between the shark and the skate, thornback, &c. They have not the 



1 [Hunt. Prep. Phys. Series, No. 2395.] 



2 [The jaws and teeth of this fish form No. 441, Hunt. Osteol. Series. In Collins's. 

 ' System of Anatomy,' fol. 1685, the viscera of a Squatina are represented in plate 27, 

 as " A Kingston opened."") 



